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Displaying posts with tag: Databases (reset)
Communications link failure MySQL JDBC with TLS

Ran into an interesting situation trying to configure a MySQL JDBC driver to connect over TLS (though the driver may call it SSL, TLS is the name for more recent versions of the protocol).

The error I was getting was pretty generic:

Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

With the relevant parts of the stacktrace, also being non helpful:

at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174)
        at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64)
        at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:835)
        at com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:455)
        at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:240)
        at …
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Giving back to the Community -- ChickTech Austin

I am doing something this weekend that is way out of my comfort zone and I want to encourage you to do something similar.  On Saturday I will be teaching a pop up workshop for Chick Tech Austin titled An Introduction to Databases with MySQL.  

Why is this out of my comfort zone?  I regularly speak to computer professional on databases and programming and have done so for years.  But this Saturday the class is made up of young women between the ages of fourteen and eighteen.For us oldsters, the class is made up of people half the age of MySQL, Python, and Java.  Their parents are probably younger than Structured Query Language! But these young folks are going to be inheriting our code bases based on technologies used today and integrated with future innovations. 

Another point of reference is that the …

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Reminder: Madrid MySQL User Group Meetup presenting dbdeployer on Thursday in Madrid

This is a quick reminder that on Thursday (tomorrow) there there is a Madrid MySQL Users Group Meeting where Giuseppe Maxia will be presenting dbdeployer to us. More information can be found here. Do not forget to sign up if you are interested. We look forward to seeing you there.

Reminder: MySQL User Group NL and Madrid MySQL User Group Meetups presenting Scaling MySQL this week (Monday/Thursday)

This is a quick reminder that this week there are 2 MySQL User Group Meetings (Amsterdam and Madrid) where we will be talking about Scaling MySQL. Guest speaker will be Morgan Tocker from PingCap who will talk about TiDB. More information: MySQL User Group NL  meetup taking place on Monday (presenting: Morgan, Daniël and Simon) … Continue reading Reminder: MySQL User Group NL and Madrid MySQL User Group Meetups presenting Scaling MySQL this week (Monday/Thursday)

2018-11-15: Announcing: Scaling MySQL with TiDB, Vitess and MySQL Cluster at Madrid MySQL Users Group

[ English ] – texto en español abajo We’re pleased to announce the next Madrid MySQL Users Group meetup which will take place on the 15th of November at 19:00.  Sign up details can be found here.  There’ll also be a similar meetup in Amsterdam on the 12th November hosted by a colleague. Details here. … Continue reading 2018-11-15: Announcing: Scaling MySQL with TiDB, Vitess and MySQL Cluster at Madrid MySQL Users Group

How to List All Databases in MySQL

We will show you how to list all databases in MySQL. MySQL is an open-source relational database management system commonly used with web based applications like WordPress, Magento etc. In this tutorial we will show you how to list all databases in MySQL on a Linux VPS. Before you start listing all tables in MySQL, […]

I will be presenting at OpenExpoEurope in Madrid on Wednesday

This Wednesday, 6th June 2018, I will be presenting at OpenExpo Europe in Madrid: Experiences with testing dev MySQL versions and why it’s good for you.  It’s always good to test new releases of MySQL and this presentation talks about why.  If you are at the conference then please come along and say hello. Update 2018-06-07.  … Continue reading I will be presenting at OpenExpoEurope in Madrid on Wednesday

How to Install MySQL on CentOS 7

Let us show you how to install MySQL on your CentOS 7 server. MySQL is a relational database management system that functions through the use of a query system. Created in 1995, it’s an open-source project that is currently developed by Oracle, and has existed since 1995. It’s fast, written in C and C++, and […]

MariaDB to Hadoop in Spanish

Nicolas Tobias has written an awesome guide to setting up replication from MariaDB to Hadoop/HDFS using Tungsten Replicator, in Spanish! He’s planning more of these so if you like what you see, please let him know!

Semana santa y yo con nuevas batallas que contar.
Me hayaba yo en el trabajo, pensando en que iba a invertir la calma que acompa;a a los dias de vacaciones que libremente podemos elegir trabajar y pense: No seria bueno terminar esa sincronizacion entre los servidores de mariaDB y HIVE?

Ya habia buscado algo de info al respecto en Enero hasta tenia una PoC montada con unas VM que volvi a encender, pero estaba todo podrido: no arrancaba, no funcionba ni siquiera me acordaba como lo habia hecho y el history de la shell er un galimatias. Decidi que si lo rehacia todo desde cero iba a poder dejarlo escrito en un playbook y ademas, aprenderlo y automatizarlo hasta el limite de poder desplegar de forma automatica on …

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MMUG19: Multi-instances with Galera Cluster and MySQL 8.0 on 25th April in Madrid

The Madrid MySQL Users Group has been a bit quiet recently so we thought it would be good to have a meeting again. The next meeting will take place next on Wednesday, 25th April and will cover Galera Cluster (Presentation by Emanuele Mottola).  We will also talk about MySQL 8.0 and any latest updates that … Continue reading MMUG19: Multi-instances with Galera Cluster and MySQL 8.0 on 25th April in Madrid

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